Henry Hadley may refer to:
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Henry Kimball Hadley (1871–1937), American composer and conductor
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Henry Hadley (died 1914)
Henry Hadley (27 March 1863 – 5 August 1914) was an English civilian who was fatally shot in Germany, allegedly while resisting arrest, on 3 August 1914, the day before the United Kingdom's entry into the First World War. He is sometimes descri ...
(1863–1914), English civilian, the "first British casualty" of World War I
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Henry Hamilton Hadley (1826–1864), American theologian
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Red Hadley (Henry Hadley), Negro league baseball player
{{hndis, Hadley, Henry